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14800 St. Mary’s Lane, Suite 270 Houston, Texas 77079 USA Phone (281) 558-0290 Web www.zentech-usa.com Email [email protected]
14800 St. Mary’s Lane, Suite 270 Houston, Texas 77079 USA Phone (281) 558-0290 Web www.zentech-usa.com Email [email protected]
BACKGROUND Founded in 1978, Zentech is a Houston-based design and consulting engineering company providing services to the offshore oil and gas industry. Zentech presents itself as a small, efficient, and cost-effective group of professionals specializing in providing services to the marine, petroleum, and construction industries.
OPERATIONAL PHILOSOPHY
Fundamental to Zentech’s organizational and operational philosophy is its commitment to staying on the cutting edge of knowledge. This is what keeps us and our clients ahead. We ensure this by continually upgrading existing competencies and creating new ones, at the organizational level, as well as the individual level. Zentech has in place specific mechanisms to turn individual and group expertise into organizational knowledge, and to draw business value from this knowledge by using it to upgrade and enhance organizational capabilities.
The core strength of Zentech is based on a strong culture of teamwork and professionalism, which encompasses respect for the individual, integrity, efficiency, trust, client focus, and a pursuit of excellence. Our values are non-negotiable. They are never to be compromised. For us, our values are our foundation. They help guide our actions and decisions.
VISION
Zentech shall be a professionally managed engineering consulting firm, committed to total customer satisfaction. Zentech employees shall be an innovative, entrepreneurial, and empowering team, consistently creating value and attaining global benchmarks. Zentech shall foster a culture of caring, trust, and continuous learning.
MISSION
Zentech shall pursue the creation of value for its clients, employees, and society at large.
QUALITY POLICY
At Zentech, we believe that quality is a culture, expressed in the way we interact with, and cater to, the needs of our clients and in the services we deliver. Zentech’s quality assurance program is key to ensuring the integrity of our engineering solutions and allows us to provide our services to a wide variety of clients worldwide. Our projects have received approval from the following regulatory agencies: DnV, ABS, Lloyd’s, BV, DeN, GL, NPD, NMD, USCG, and SOLAS. Our emphasis on quality is reflected in the following policies:
- Recognize and respect clients’ right to receive quality services, on time, and within budget. - Endeavor to exceed clients’ expectations of competence, performance, delivery schedule, and value, thus becoming their preferred
choice for repeat business. - Strive constantly to improve upon our standards of quality, efficiency, and productivity. - Achieve shared objectives in an atmosphere of fairness, integrity, dignity, and courtesy towards clients, employees, and competitors.
Zentech adheres to the highest standards of ethical business behavior, and our reputation for adhering to these standards is one of our most valuable assets. Our core values are used as a touchstone for our daily work.
We suggest, appreciate, and welcome the opportunity to meet and discuss your specific project needs and develop solutions for your consideration. Zentech’s assistance is offered on a project-by-project basis, or as an overall engineering assistance
program.
Corporate Overview
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Zentech’s main engineering disciplines include Structural Engineering, Naval Architecture and Marine Engineering, and Mechanical and Electrical Engineering. Our range of services include (but not limited to) the following:
STRUCTURAL ENGINEERING
- Analysis and design of fixed offshore platforms including jackets, topsides, helideck, accommodation modules etc. - Reassessment of existing offshore oil platforms, jackup rigs, semisubmersibles, etc. and reserve strength assessment - Jackup rig conversion and modifications including slot to cantilever conversion, extension of cantilevered rigs, increase in leg length,
drilling package modifications, and other system upgrades - Design and analysis of floating structures including semisubmersibles, TLPs, Spars, FPSOs, etc. - Floating structures for offshore operations and construction, such as derrick / crane barges, pipelay barges, shear-leg lift vessel, multipurpose barges, etc. - Load out and transportation analysis including design of grillage and sea fastening arrangements
NAVAL ARCHITECTURE AND MARINE ENGINEERING
- Stability Analyses (intact and damage) - Mooring Analysis (static, quasi-static, dynamic, and fatigue) - Motions Analysis (radiation-diffraction) - Loading Conditions and Preload / Ballasting Procedures - Longitudinal Strength - Displacement and Payload Upgrades - Tonnage and Freeboard Calculation - Loadline Calculations - Deadweight Survey and Inclining Experiments
MECHANICAL AND ELECTRICAL ENGINEERING - Piping Systems - HVAC System - Firefighting System - DP Systems - Riser Tensioners Upgrade - Electrical System Design and Calculations - Skidding System Design and Modifications - Fire Detection Systems - Mechanical Locking System - Instrumentation, etc.
CAD SERVICES
Zentech offers CAD Services that produce specialized AutoCAD design, detailing, and fabrication drawings for marine, offshore, and commercial applications
NEW JACKUP RIG DESIGNS
Zentech has developed three new jackup rig designs: the Z-210, R-550D, and Z-636. These rigs are designed for superlative performance and easy construction. The R-550D and the Z-636 rigs include the patented “ZENLOCK” jacking system. For more information on any of
our new rig designs, please contact Zentech.
Engineering Capabilities
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Engineering Projects
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Conversion from slot-type to cantilevered jackup drilling rigs:
Several dozen rigs have been studied and converted from slot-type to cantilevered jackup drilling rigs. Closing of the slot, skid rail and skid rail bulkhead design, design of pushups and hold downs. Some of these projects were for the national drilling companies of various countries. These rigs were of various designs which include LeTourneau, Hitachi, Levingston, Bethlehem, F&G, and Baker Marine with different water depth capabilities. Other jackup rig modifications: Design of subbase and
substructure areas, drill floor design and modifications, derrick and setback area modifications, raw water tower design, quarters modifications, helideck design and modifications, leg extensions and modifications for deeper water and harsher environments.
Reassessment and Life Extension for 26 Jackets in the Bay of Campeche including pushover analyses for wave and seismic loads, spectral fatigue analysis, and risk-based inspection planning. Jacket Fatigue Analysis: Verify existing jacket for fatigue assessment for water depth of 148 ft. Drilling Platform Jacket Analysis: Design & Drawings for 185 ft water depth.
Design of a Drilling Platform Jacket Structure in the GoM in 243 ft water depth. Design of a Drilling Platform Jacket in 122 ft water depth.
Conversion of an accommodation semi-submersible to a drilling unit: An
accommodation semisubmersible was converted from 600 plus man accommodation unit to a 7500 ft operating water depth DP class III drilling rig. The rig has been operating successfully for BP in Gulf of Mexico. Enhancing the water depth capability of Pentagon class semi-submersibles:
Modifications to the hull and systems to enable the semisubmersible to drill in deeper waters. P-Tank rack, lifeboat structure, pipe rack and riser rack area, and crane upgrade designs. Increased quarters capacity, enhanced variable load capacity. Other semisubmersible rig modifications: Increased variable load capacities in
transit, operating and/or survival modes. Complete global and local structural analysis, stability analysis, mooring analysis, and motions analysis. Foundation designs for riser tensioners, APV bottles, P-Tanks, mooring winches, crane column, and crane boom rest. Lifeboat support structure and P-Tank support design. Design and analysis of riser rack and pipe rack areas, drill floor, derrick, and setback areas.
Engineering Projects
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Catamaran Barge: Designed for various applications with
up to 4 lifting lugs on the cross beams. Capacities up to 4000 Tons. Design and analysis of cross beams and the barges. Structural analysis, stability and ballasting, motions analysis, and mooring analysis. Heavy Lift Crane Barge: Conversion of a dumb barge into
a derrick barge with lifting capacity of 1600 Tons in revolving mode. Structural and Naval Architectural studies, Electrical and Mechanical systems design. Design of 102 man quarters.
Derrick/Pipelay Barge: On-site supervision of upgrades and
conversion from jetting barge to a jetting/pipelay barge. This vessel is currently in operation in the GoM. Shear-Leg Crane Barge: Used for bridge construction with a capacity to lift 2000 Tons at 130’ radius. Lifting scenarios and ballasting calculations, boom structural analysis, and design of the new barge.
Harsh Environment Mooring System: A 32-point mooring
system design for bridge caissons which were built in-situ, under the influence of up to 8 knot tidal current and 13 feet tidal variations. Assisted in model testing, developing the instrumentation system for real-time measurements, developed real-time mooring and motions monitoring system, and assisted in the field during the deployment of the mooring system.
SBIR: Improved Life Prediction of Turbine Engine Components, Phase I and II – included extension of 3D crack propagation
analysis program based on FEM to include modeling of different types of cracks, effects of residual stress including contact effects, retardation, load spectrum, etc. The project was done under the supervision of US Air Force. Deadweight Surveys and Incline Experiments: Performed deadweight surveys and incline experiments on several dozen
vessels including mat-supported rigs, jackup rigs, barges, and semisubmersibles. Prepared survey procedure and performed the tests and provided submittals to classification societies for approval of lightship values. Construction Supervision and On-site Assistance: Supervision and assistance provided for new builds, conversions and
modifcations of drilling rigs, production vessels, derrick/pipe-lay barges, offshore construction vessels, offshore support vessels, etc.
Engineering Software
The software development group at Zentech develops and markets the following state-of-the-art commercial software, primarily for Naval Architectural applications.
ZENMOOR MOORING ANALYSIS SOFTWARE FOR FLOATING VESSELS
ZenMoor is a Powerful State-of-the-Art, Windows-based program for Mooring Design and Analysis of Semisubmersibles, FPSOs, Spars, Barges, and other Floating Production Systems.
- Static, Quasi-Static and Dynamic Analysis - Mooring Line Dynamic Analysis in Frequency and Time Domain - Fatigue Analysis of Mooring Lines - Vessel Relocation Analysis and Transient Motion Analysis - Display of Pipelines, Pipeline Clearance, and Buoy Immersion
Distances - Database of Chain, Wire, and Anchor from Manufacturers - Choice of Wave and Wind Spectra
NEPTUNE WAVE RADIATION AND DIFFRACTION ANALYSIS FOR LARGE FLOATING BODIES
Neptune analyzes structures ranging from a simple barge or caisson to a complex semisubmersible, TLP, or Floating Production System. Neptune employs a 3D constant panel radiation and diffraction analysis procedure
to compute the hydrodynamic coefficients, motion RAOs, and wave drift loads.
- Graphical Interface for Model Generation - Computation of Hydrodynamic Coefficients and Wave Loads - Wave Frequency Motion Response and RAOs - Mean Wave Drift Forces and Static Offset - Slowly Varying Wave-Drift Forces and Damping Spectrum - Regular and Random Waves - Load Mapping to Structural Beam and Plate Elements
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- Rig specific Mooring Advisory Program for all floating vessels - Considers Influence of Thrusters, usage of Buoys and Clump Weights,
Adding and Deleting Line Segments, Effect of Bottom Slope, etc. - Good Graphic displays of the results along with line spread and profile - Complete mooring analysis output parameters like line tension, vessel
offset, pipeline clearance, anchor positions, relocation distance, etc., in graphic and text modes
- Static, Quasi-Static, and line break Transient Analysis
ZENMAP ONBOARD POSITIONING AND MOORING ADVISORY SOFTWARE
ZenMAP is a powerful State-of-the-art, rig-specific Mooring Advisory Program for use on Offshore Drilling Vessels, Floating Production Systems, and other Moored Vessels.
Engineering Software
LOSJACK ONBOARD LOAD AND STABILITY CALCULATOR FOR JACKUP RIGS
Part of Zentech’s Suite of Load and Stability Calculating Programs, LosJack is an interactive, menu-driven, rig-
specific software used in data management and loading calculations in the day-to-day operations of Jackup Rigs.
- Calculation of Liquid Weights and CGs from Tank Tables - Calculation of Free Surface Moments in Each Tank and for the
Complete Vessel - Damaged Stability Calculations - Leg Load and Soil Pressure Calculations - Preload Schedule with Punch Through Calculations - Comparison of Leg Penetration with Soil Properties - Load Equilization Calculations - Graphical Display of Rig, Weights, and Tanks
LOSEMI ONBOARD LOAD AND STABILITY CALCULATOR FOR SEMISUBMERSIBLES
Part of Zentech’s Suite of Load and Stability Calculator Programs, LoSemi is an interactive, menu-driven, rig-specific software used in data management and loading calculations in the day-to-day operations of Semisubmersibles.
- Calculation of Liquid Weights and CGs from Tank Tables - Calculation of Free Surface Moments in Each Tank and for the
Complete Vessel - Damaged Stability Calculations - Interface with Mooring Advisory Software ZenMAP - Large Angle Stability Calculations - Performs Ballasting and Deballasting Procedures and Load Equalization Calculations - Graphical Display of Rig, Weights, and Tanks
Z-RISER RIGID RISER ANALYSIS
Z-Riser is a 3D finite element analysis program for static, frequency domain, and time domain analysis of rigid
drilling risers. Analysis can be performed on a riser in connected or disconnected configuration.
- Capable of geometric non-linear analysis with large displacements - Finite elements include 3D Beam elements, Flex/Ball joints,
Point Mass elements - API RP 16Q code checks - Displacement history for vessel motion and static offset - Profile, Envelope, Dynamic History, Static Parametric Study, and
Configuration plots available - Nodal and Element Level variables - Output includes top angle, bottom angle, bottom tension, Max.
Von-Mises stress, Max. combined stress, and Slip Joint travel
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For more information about the above programs, please contact Zentech.
For our consulting engineering work, Zentech uses all the above programs and Structural Engineering Analysis and Design Program StruCAD*3D and Stability Analysis Program StabCAD.
Partial Client List
Kerr-Mcgee Oil & Gas Onshore LLC Pride International Inc. Parker Drilling Chiles Offshore LLC Mitsubishi Heavy Industries Exxon/Mobil Company Freide Goldman Willbros Engineers Inc. Letourneau, Inc. Massman Construction Co. OASES Offshore, Inc. Lloyd’s Register Of Shipping Schlumberger Technical Services, Inc. Aban Lloyd Chiles Offshore Ltd. Great Eastern Shipping Co. Ltd. Damit Worley Engineering Jurong Shipyard Hyundai Mipo Dockyard Co., Ltd. Aramco Services Company Petro-Tech Peruana S.A. National Drilling Company Damus Limited J. Ray McDermott Engineering, LLC Pemex Murphy Oil Fluor Daniel, Inc. J.P. Kenny Dominion Exploration and Production Tacoma Narrows Constructors Kiewit Engineering Company Kiewit / FCI / Manson - a Joint Venture
GlobalSantaFe Transocean Offshore R. J. Brown & Associates Nabors Offshore Corporation Rowan Companies R & B Falcon Atwood Oceanics Diamond Offshore Drilling Cliffs Drilling Company Shell Oil Company Noble Drilling Corporation ENSCO BP Amoco Brown & Root (U.K.) Friede Goldman Offshore Brown & Root (U.S.A.) BHP Engineering & Construction Sedco - Forex Maersk Drilling Chiles Offshore Chevron Research & Technology Phillips Petroleum Conoco, Inc. Paragon Engineering Amoco Transocean A.S. Mobil Oil Research & Development Oceaneering Prod. Systems Technip Rauma Offshore OY Oil & Natural Gas Corporation Falcon Drilling Co., Inc. Lamprell
CONTACT US
Zentech, Inc. 14800 St. Mary’s Lane, Suite 270 Houston, Texas 77079 USA Tel: (281) 558-0290 Fax: (281) 558-0295 Email: [email protected]
Zentech India Offshore & Marine Engineering Pvt. Ltd. 103/104 Building #5, Sector-2 Millennium Business Park, Mahape Navi Mumbai 400701, INDIA Tel: 91-22-27781416 Fax:91-22-27781410 Email: [email protected]
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Zentech Mexico Calle Pedro de Alvarado #68 Colonia Lomas de Cortes Cuernavaca, Morelos C.P. 62240, MEXICO Tel: 52-777-101-8887 Email: [email protected]
Zentech do Brasil Servicos Técnos Ltda. Av. Rio Branco 37, Gr. 1403, Rio de Janeiro, RJ 20090-003 Tel: +55-21 2223-3310 Fax: +55-21 2283-3621 www.zentechbrasil.com
